Change new List(n) to return fixed length list.

tests/standalone/io/file_invalid_arguments_test.dart

Index: tests/standalone/io/file_invalid_arguments_test.dart
diff --git a/tests/standalone/io/file_invalid_arguments_test.dart b/tests/standalone/io/file_invalid_arguments_test.dart
index 4be142ad7997d526fcf3c353e5b3221707d22a27..26c95578da8657bf277f8e1a570a7f60382f5e2e 100644
--- a/tests/standalone/io/file_invalid_arguments_test.dart
+++ b/tests/standalone/io/file_invalid_arguments_test.dart
@@ -144,10 +144,10 @@ String getFilename(String path) {
 main() {
   testReadInvalidArgs('asdf');
   testReadListInvalidArgs(12, 0, 1);
-  testReadListInvalidArgs(new List.fixedLength(10), '0', 1);
-  testReadListInvalidArgs(new List.fixedLength(10), 0, '1');
+  testReadListInvalidArgs(new List(10), '0', 1);
+  testReadListInvalidArgs(new List(10), 0, '1');
   testWriteByteInvalidArgs('asdf');
   testWriteListInvalidArgs(12, 0, 1);
-  testWriteListInvalidArgs(new List.fixedLength(10), '0', 1);
-  testWriteListInvalidArgs(new List.fixedLength(10), 0, '1');
+  testWriteListInvalidArgs(new List(10), '0', 1);
+  testWriteListInvalidArgs(new List(10), 0, '1');
 }